The general harmonic-oscillator brackets: compact expression, symmetries, sums and Fortran code

We present a very simple expression and a Fortran code for the fast and precise calculation of three-dimensional harmonic-oscillator transformation brackets. The complete system of symmetries for the brackets along with analytical expressions for sums, containing products of two and three brackets, is given.Comment: 13 pages, accepted for publication in Nuclear Physics

Absence of Bilateral Differences in Child Baseball Players with Throwing-related Pain

© Georg Thieme Verlag KGStuttgart · New York.The aim of this study was to assess whether side-to-side differences in morphology and function of the upper limbs in 11-12 year-old male baseball players with throwing-related pain (n=14) were more pronounced than that of age-matched healthy untrained subjects (n=16). Baseball players 1) had played baseball≥4.5 h·wk−1 for ≥ 4 years and (2) suffered from moderate-intensity (3-6 points on 10-point questionnaire scale) throwing-related pain in the shoulder or elbow in at least 2 training sessions within the past month. The range of motion (ROM), function and structure of the elbows and shoulders were assessed using goniometry, isokinetic dynamometry and ultrasonography. While the ROM and eccentric external peak torque of internal shoulder rotation were lower, the thickness of the supraspinatus tendon, the ulnar collateral ligament and articular cartilage of the humeral head were larger in baseball players than controls. There were, however, no significant side-to-side differences in any parameter in either group. In conclusion, it is unlikely that side-to-side differences in shoulder and upper limb structure and function contributed to the throwing-related pain in young baseball players, but low shoulder eccentric external peak torque and range of internal rotation may predispose to throwing-related pain

Early anterior knee pain in male adolescent basketball players is related to body height and abnormal knee morphology.

To compare knee torque, range of motion, quality of movement, and morphology in dominant and nondominant legs of male adolescent basketball players with and without anterior knee pain and untrained peers.Cross-sectional.Sports performance laboratory.Male basketball players aged 14-15 years with and without anterior knee pain and healthy untrained subjects (n = 88).Basketball players were allocated to a symptomatic or asymptomatic group based on self-reported anterior knee pain. Associations between pain and body mass, height, passive range of motion, muscle peak torque, coactivation, neuromuscular control, proprioception, and ultrasound observations were investigated.The prevalence of pain did not differ significantly between sides. Of 176 knees inspected, 44 were painful, and 26 of these exhibited abnormalities in ultrasonography. Symptomatic players were 5.0 and 6.9 cm taller than asymptomatic players and controls, respectively (P < 0.05). In athletes with knee pain, the odds ratios of morphological abnormalities and greater height were increased by 8.6 and 5.0 times (P < 0.001).Knee pain prevalence in adolescent basketball players was not related to differences between sides but was higher in tall players. Knee pain was accompanied by morphological abnormalities detected with ultrasound

Ultrafast relaxation of photoexcited carriers in semiconductor quantum wires: A Monte Carlo approach

A detailed analysis of the cooling and thermalization process for photogenerated carriers in semiconductor quantum wires is presented. The energy relaxation of the nonequilibrium carrier distribution is investigated for the ‘‘realistic'' case of a rectangular multisubband quantum-wire structure. By means of a direct ensemble Monte Carlo simulation of both the carrier and the phonon dynamics, all the nonlinear phenomena relevant for the relaxation process, such as carrier-carrier interaction, hot-phonon effects, and degeneracy, are investigated. The results of these simulated experiments show a significant reduction of the carrier-relaxation process compared to the bulk case, which is mainly due to the reduced efficiency of carrier-carrier scattering; on the contrary, the role of hot-phonon effects and degeneracy seems to be not so different from that played in bulk semiconductors

Experimental study on injection characteristics of diesel-bioethanol fuel blends

This article presents the test results of injection processes of diesel-bioethanol fuel blends on a high pressure common rail injection system. The injection characteristics were analyzed using the injection rate measuring instrumentation. The injection rate, cycle injection quantity, injection delay and injection duration were analyzed across a range of injection pressure and injection energizing time. As the results show, the peak injection rate and delay of diesel-ethanol blends are lower compared to diesel fuel. The injection duration and discharge coefficients of diesel-ethanol blends were lower than those of diesel fuel. It was observed that fuel density and fuel viscosity have significant influence on the injection characteristics

Revised calculation of four-particle harmonic-oscillator transformation brackets matrix

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018) Abstract In this article we present a new, considerably enhanced and more rapid method for calculation of the matrix of four-particle harmonic-oscillator transformation brackets (4HOB). The new method is an improved version of 4HOB matrix calculations which facilitates the matrix calculation by finding the eigenvectors of the 4HOB matrix explicitly. Using this idea the new Fortran code for fast and 4HOB matrix calculation is presented. The calculation time decreases more than a few hundred times for l... Title of program: HOTB_M Catalogue Id: AEFQ_v3_0 Nature of problem Calculation of the matrix of 4HOB in a more effective way, which allows us to calculate matrix of the brackets up to a few hundred times more rapidly than in a previous version. Versions of this program held in the CPC repository in Mendeley Data AEFQ_v1_0; HOTB; 10.1016/j.cpc.2009.10.012 AEFQ_v2_0; HOTB; 10.1016/j.cpc.2011.01.031 AEFQ_v3_0; HOTB_M; 10.1016/j.cpc.2012.09.021 AEFQ_v4_0; HOTB_MPI; 10.1016/j.cpc.2014.06.02

N-pakeistų A,β- and B,γ- aminorūgščių darinių įtaka rapsų (Brassica napus L.) augimui in vitro ir metabilitų kaupimui sėklose

Naudojant naujus sintetinius augimo reguliatorius rapsų auginimo technologijoje in vitro, galima kontroliuoti jų augimą, pirminių ir antrinių metabolitų susidarymą. Nustatytas N-pakeistų a,(3- and p,y - aminorūgščių darinių poveikis rapsų 'Sponsor' augimui in vitro, įvertinti metabolitų kiekiai rapsų sėklose, gautose iš rapsų, augintų Murashige-Skoog terpėje su l-(2,2,6,6-tetrametilpiperidin-4-il)-4-karboksi-2-pirolidinonu (esant 200 mgl"' koncentracijai). Tyrimais nustatyta, kad rapsų augimą in vitro stimuliavo l-fenil-5-karboksimetilhidantoino natrio druska, 1 -(4-fenoksifenil)-4-karboksi-2-pirolidinono natrio druska, 1 -(2,2,6,6-tetrametilpiperidin-4-il)-4-karboksi-2-pirolidinonas. Riebalų ir baltymų kiekiai subrendusiose rapsų 'Sponsor' sėklose, gautose iš rapsų, augintų in vitro MS terpėje su l-(2,2,6,6-tetrametilpiperidin-4-il)-4-karboksi-2-pirolidinonu padidėjo 1,04 karto, ląstelienos - 1,17 karto, o gliukozinolatų kiekis padidėja nežymiai, palyginus su kontroliniame variante augintais augalaisVytauto Didžiojo universitetasŽemės ūkio akademij

Converging upper and lower bounds for ground-state energies of atomic nuclei

By expanding the wave function in terms of the translationally invariant basis of harmonic oscillator functions, we calculate the converging upper (variational) bound for the energy. It is shown that one can construct lower bounds using the reduced density matrix that corresponds to the upper bound. These lower bounds converge to an exact value with the expansion of the basis. We perform the calculations of both bounds with realistic nucleon-nucleon potential for ground states of the triton and the alpha-particle